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Targeted Next-generation Sequencing and Bioinformatics Pipeline to Evaluate Genetic Determinants of Constitutional Disease
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A Novel Recessive RPGRIP1 Mutation Causing Leber Congenital Amaurosis.
H Abouzeid1, I S Othman2, D F Schorderet1
1IRO - Institute for Research in Ophthalmology, Sion, Switzerland.
Klinische Monatsblatter Fur Augenheilkunde
|April 27, 2016
Summary
A novel RPGRIP1 gene mutation caused Leber congenital amaurosis in a young Egyptian girl. This finding advances understanding of genetic retinal dystrophies and potential therapeutic targets.
Area of Science:
- Genetics
- Ophthalmology
- Neuroscience
Background:
- Leber congenital amaurosis (LCA) is a severe, early-onset inherited retinal dystrophy with diverse genetic causes.
- Mutations in the RPGRIP1 gene are known to cause LCA and cone-rod dystrophy, despite ubiquitous gene expression.
Observation:
- A consanguineous Egyptian family with a four-year-old girl diagnosed with LCA was studied.
- The patient presented with severe visual impairment from infancy, characteristic fundus changes (disc pallor, attenuated vessels), and neurodevelopmental delay with brain atrophy.
Findings:
- High-throughput sequencing identified a novel homozygous deletion, c.[420delG], in the RPGRIP1 gene.
- This specific RPGRIP1 mutation was absent in 80 control individuals and previously unreported.
Implications:
- Discovering new mutations in LCA-associated genes like RPGRIP1 enhances comprehension of retinal dystrophy pathogenesis.
- Such findings are crucial for accurate diagnosis, genetic counseling, and developing targeted therapies for inherited retinal diseases.
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